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Listen to the conversation and complete the following sentences with NO MORE THAN TWO WORDS. Articles, books and the __________ are sources of the knowledge on a lecture topic.

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Listen to the conversation and complete the following sentences with NO MORE THAN TWO WORDS. Ailie’s lecture focuses on __________ .

Listen to the statement and circle the appropriate letter. Which is not the disadvantage of use of fossil fuels

A. high cost
B. greenhouse gas emission
C. burning fast

Listen to the conversation and complete the following sentences with NO MORE THAN TWO WORDS. Reading __________ can help Ailie find out an attractive topic.

Listen to the statement and circle the appropriate letter. Except diesel, most cars run on __________ .

A. oil
B. gasoline
C. natural gas

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